Massive Core

MCore Logotype

MassiveCore Logotype


MassiveCore is a Bukkit plugin that contains components the MassiveCraft developers use for developing other Bukkit plugins. MassiveCore contains utilities for:

  • ItemStack and Inventory serialization
  • Command programming
  • Plugin integration programming
  • Data storage with json
  • Disc IO
  • ... and much more

Useful Links


Note: There is no point to installing MassiveCore on it's own. A few other plugins make use of MassiveCoreand if you want to use them you will need to install it.

  1. This plugin requires Java 7.
  2. Download the appropriate version of MassiveCore here on BukkitDev (usually the latest one)
  3. Put the jar file in the plugins folder

Plugins Using MassiveCore


What are the permissions? The commands? Read more in the Full Documentation.

Official Server

MassiveCore is developed by
You are most welcome to join in and play with us :)

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  • Avatar of gamingfreak2000 gamingfreak2000 Jul 18, 2014 at 10:49 UTC - 0 likes

    Hi, Does Anyone Know Why My Mcore And Factions Isnt Working With Spigot? Heres The Error Message: ( [spigot.jar:git-Spigot-1554] at [spigot.jar:git-Spigot-1554] ... 6 more Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R3.PlayerInventory at [spigot.jar:git-Spigot-1554] at [spigot.jar:git-Spigot-1554] at java.lang.ClassLoader.loadClass( [?:1.7.0_03] at java.lang.ClassLoader.loadClass( [?:1.7.0_03] at com.massivecraft.mcore.MCore.getMCoreGsonBuilder( [?:?] at com.massivecraft.mcore.MCore.( [?:?] at java.lang.Class.forName0(Native Method) [?:1.7.0_03] at java.lang.Class.forName( [?:1.7.0_03] at [spigot.jar:git-Spigot-1554] at [spigot.jar:git-Spigot-1554] ... 6 more [05:38:50] [Server thread/ERROR]: Could not load 'plugins/Factions.jar' in folder 'plugins' org.bukkit.plugin.UnknownDependencyException: mcore at org.bukkit.plugin.SimplePluginManager.loadPlugins( [spigot.jar:git-Spigot-1554] at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugins( [spigot.jar:git-Spigot-1554] at net.minecraft.server.v1_7_R4.DedicatedServer.init( [spigot.jar:git-Spigot-1554] at [spigot.jar:git-Spigot-1554] at [spigot.jar:git-Spigot-1554]

  • Avatar of mazdaice56 mazdaice56 Jul 17, 2014 at 12:20 UTC - 0 likes

    Why doesnt it run on my server????? I just get errors spammed on the console. can anyone help?

  • Avatar of XLighterShadowX XLighterShadowX Jul 16, 2014 at 13:38 UTC - 0 likes

    Errors spamming my console that weren't present last night. looking at the comments below I assume I just have to update craftbukkit to the latest dev build?

    EDIT: Ignore that false assumption but the source is on Git, even if it wasn't officially updated as regularly as we'd like someone can always recompile it to newer versions of craftbukkit and and make the minor modifications (renaming files for example) needed to make it work then uplaod it to dropbox or something.

    Last edited Jul 17, 2014 by XLighterShadowX

    Famous Plugin Director 2010-2012 (worked with 125+ servers, 60+ successful)

    Making a comeback in 2015 with my own huge project.

  • Avatar of fastlockel fastlockel Jul 16, 2014 at 05:53 UTC - 0 likes

    look at the exception when you start with latest bukkit, they use x.X.R3.x.Inventories and should be x.X.R4.x.Inventories

    and this is not the only one, Quests and Citizens have the same issues BUT they rebuild the new jar when a newbukkit version is available.

    - either you AVOID using version specific APIs OR - you quickly update your plugin wen new bukkit versions are available. I think they rebuild jar only when the upgrade their servers or even later.

    I shall update bukkit by the end of the week on my server and will just set a message that faction is not working anymore beacause of non compliancy with bukkit. Using version specific APIs and not providing weekly dev builds is a problem.

    Last edited Jul 16, 2014 by fastlockel
  • Avatar of fcernese fcernese Jul 15, 2014 at 14:22 UTC - 0 likes

    <<reply 2268886>>

    What's the package they renamed? I can assume that it must not be used by very many plugins, as mcore is the only one that has a problem when the R- number changes.

  • Avatar of fastlockel fastlockel Jul 15, 2014 at 12:45 UTC - 0 likes

    This is not completely the fault of mcore plugin, Bukkit has renamed some java packages from R1 to R2 and R3 (changing a digit!) Hovever rebuilding for the new bukkit api should be quite straigtht forward (just reame packages imports).

  • Avatar of eagles124 eagles124 Jul 15, 2014 at 01:40 UTC - 0 likes

    @Coul455: Go

    im having the same problem if you got a fix please add me on skype : wells218

  • Avatar of ColonelJdog ColonelJdog Jul 15, 2014 at 00:37 UTC - 0 likes

    Please update to 1.7.10. It is no longer working.

    Owner, Ioncraft: Minecraft Server

  • Avatar of fcernese fcernese Jul 15, 2014 at 00:05 UTC - 0 likes

    So what is it in mcore / factions / et al. that cause it to not like updates to bukkit?

  • Avatar of fastlockel fastlockel Jul 14, 2014 at 01:43 UTC - 0 likes

    source code has been updated to 1.7.10 but no dev build. plugin dependancy : mcore / quests / factions / citizens2 / and bukkit becomes a nightmare

    Last edited Jul 14, 2014 by fastlockel


Date created
Jan 25, 2012
Last update
Jul 23, 2014
Development stage
  • enUS
MIT License
Curse link
Massive Core
Recent files